<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>姓名案例-计算属性实现</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        姓：<input type="text" v-model="firstname"><br/>
        名：<input type="text" v-model="lastname"><br/>
        全名：<span>{{fullname}}</span>
    </div>
</body>

<script>
    new Vue({
        el:'#root',
        data:{
          firstname:'张',
          lastname:'三'
        },
        /* computed:{
            fullname:{
                get(){
                    return this.firstname+'-'+this.lastname;
                },
                set(){
                    const arr=value.splite('-')
                    this.firstname=arr[0]
                    this.lastname=arr[1]
                }
            }
        } */
        //只读不写的情况才能用简写
        //function 的作用与get相似
        computed:{
            fullname(){
                return this.firstname+'-'+this.lastname;
            }
        }
        
    })
</script>

</html>